Refrigerated compressed air dryers

are the most commonly used compressed air dryers, accounting for approximately 95% of industrial compressed air applications, due to their ease of maintenance and cost efficiency. 

They are suitable for air drying applications with requirements of up to +3 degrees C pressure dew point (according to DIN-ISO 8573.1-1-2010 class 4 water content), which corresponds to a residual moisture content of only 5.92 g/m³ in the compressed air. 

The generated pressure dew point of +3°C corresponds to a dew point at atmospheric pressure of about -20°C, i.e. 0.880 g/m³ residual water content per m³. Atmospheric dew point is the temperature to which atmospheric air - 1bar (a) can be cooled without water precipitation.

NEQXUS Refrigeration Compressed Air Dryer

+ 3°C pressure dew point

Residual moisture of 5.92 g/m³

Adsorption dryer

The most common pressure dew point for these dryers is -40°C (optionally -70°C). While this value may be required for sensitive processes or instrumentation, this dryness level is not normally required in general manufacturing unless the tubes are exposed to sub-freezing temperatures.

Note: Cold regenerating adsorption dryers consume approximately 15 to 20 percent of the compressed air produced by the compressor in purge air. When in doubt, please seek advice to select the right technology that exactly fits your application and needs. TIP Depending on the requirements of the main compressed air demand, it may be advisable to use an adsorption dryer only for partial air flows as a terminal dryer in particularly critical areas, e.g. for sensitive processes or instruments or if the air lines are exposed to freezing temperatures, so you can save considerable operating costs without loss of quality. 

NEQXUS Regenerative Adsorption Dryer

-40°C pressure dew point,

residual moisture of 0.117 g/m³,

optionally down to -70°C pressure dew point, residual moisture of 0.00269 g/m³